Eliphaz is not picking up what Job is putting down. Why not? Because Job's doubt undermines Eliphaz's entire worldview. It's not that he disagrees with Job—it's that his whole religious faith doesn't allow for it.

Quote #5

know then that God has put me in the wrong, and closed his net around me. (NRSV 19:6)

Know now that God hath overthrown me, and hath compassed me with his net. (KJV 19:6)

Job is getting aggressive here, straight up blaming God for his own doubt. Can we blame him, though? Job feels like he was set up. God says, "be good, and I'll reward you"; so Job is good, and then…he gets destroyed. Who's breaking the rules here? Job certainly gives God an earful.